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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <stdlib.h>
#include <string.h>
#include <cpu/cpu.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
#include <arch/interrupt.h>
#include <x86emu/regs.h>
#if CONFIG_PCI_OPTION_ROM_RUN_REALMODE
#include <device/oprom/realmode/x86.h>
#endif
static int via_vt8623_int15_handler(void)
{
int res=0;
printk(BIOS_DEBUG, "via_vt8623_int15_handler\n");
switch(X86_EAX & 0xffff) {
case 0x5f19:
break;
case 0x5f18:
X86_EAX=0x5f;
X86_EBX=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
X86_ECX=0x060;
res=1;
break;
case 0x5f00:
X86_EAX = 0x8600;
break;
case 0x5f01:
X86_EAX = 0x5f;
X86_ECX = (X86_ECX & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
res = 1;
break;
case 0x5f02:
X86_EAX=0x5f;
X86_EBX= (X86_EBX & 0xffff0000) | 2;
X86_ECX= (X86_ECX & 0xffff0000) | 0x401; // PAL + crt only
X86_EDX= (X86_EDX & 0xffff0000) | 0; // TV Layout - default
res=1;
break;
case 0x5f0f:
X86_EAX=0x860f;
break;
default:
printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
X86_EAX & 0xffff);
break;
}
return res;
}
#ifdef UNUSED_CODE
static void write_protect_vgabios(void)
{
device_t dev;
printk(BIOS_DEBUG, "write_protect_vgabios\n");
dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3122, 0);
if (dev)
pci_write_config8(dev, 0x61, 0xaa);
dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3123, 0);
if (dev)
pci_write_config8(dev, 0x61, 0xaa);
}
#endif
static void vga_random_fixup(device_t dev)
{
printk(BIOS_DEBUG, "VGA random fixup ...\n");
pci_write_config8(dev, 0x04, 0x07);
pci_write_config8(dev, 0x0d, 0x20);
pci_write_config32(dev,0x10,0xd8000008);
pci_write_config32(dev,0x14,0xdc000000);
}
static void vga_enable_console(void)
{
#if CONFIG_PCI_OPTION_ROM_RUN_REALMODE
/* Call VGA BIOS int10 function 0x4f14 to enable main console
* Epia-M does not always autosense the main console so forcing
* it on is good.
*/
/* int#, EAX, EBX, ECX, EDX, ESI, EDI */
realmode_interrupt(0x10, 0x4f14, 0x8003, 0x0001, 0x0000, 0x0000, 0x0000);
#endif
}
static void vga_init(device_t dev)
{
vga_random_fixup(dev);
mainboard_interrupt_handlers(0x15, &via_vt8623_int15_handler);
#ifdef MEASURE_VGA_INIT_TIME
msr_t clocks1, clocks2, instructions, setup;
// set up performnce counters for debugging vga init sequence
setup.lo = 0x1c0; // count instructions
wrmsr(0x187,setup);
instructions.hi = 0;
instructions.lo = 0;
wrmsr(0xc2,instructions);
clocks1 = rdmsr(0x10);
#endif
printk(BIOS_DEBUG, "Initializing VGA...\n");
pci_dev_init(dev);
printk(BIOS_DEBUG, "Enable VGA console\n");
vga_enable_console();
#ifdef MEASURE_VGA_INIT_TIME
clocks2 = rdmsr(0x10);
instructions = rdmsr(0xc2);
printk(BIOS_DEBUG, "Clocks 1 = %08x:%08x\n",clocks1.hi,clocks1.lo);
printk(BIOS_DEBUG, "Clocks 2 = %08x:%08x\n",clocks2.hi,clocks2.lo);
printk(BIOS_DEBUG, "Instructions = %08x:%08x\n",instructions.hi,instructions.lo);
#endif
pci_write_config32(dev, 0x30, 0);
#if 0
/* Set the vga mtrrs - disable for the moment as the add_var_mtrr function has vapourised */
unsigned long fb;
add_var_mtrr( 0xd0000000 >> 10, 0x08000000>>10, MTRR_TYPE_WRCOMB);
fb = pci_read_config32(dev,0x10); // get the fb address
add_var_mtrr( fb>>10, 8192, MTRR_TYPE_WRCOMB);
#endif
}
static struct device_operations vga_operations = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = vga_init,
.ops_pci = 0,
};
static const struct pci_driver vga_driver __pci_driver = {
.ops = &vga_operations,
.vendor = PCI_VENDOR_ID_VIA,
.device = 0x3122,
};
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